ML20155B435

Summary of Operating Reactors Events Meeting 88-22 on 880531 Re Events Which Occurred Since Last Meeting on 880524.List of Attendees,Viewgraphs & Events Discusses & Significant Elements of Events Encl

ML20155B435
Person / Time
Issue date:	06/01/1988
From:	Lanning W Office of Nuclear Reactor Regulation
To:	Rossi C Office of Nuclear Reactor Regulation
References
OREM-88-022, OREM-88-22, NUDOCS 8806130183
Download: ML20155B435 (16)

Text

__ . _ _ _ _

J1W 01 E MEM0RANDUli FOR: Charles E. Rossi, Director Division of Operational Events Assessment Office of Nuclear Reactor Regulation FROM: Wayne Lanning, Chief Events Assessment Branch Division of Operational Events Assessment Office of fluclear Reactor Regulation

SUBJECT:

THE OPERATING REACTORS EVENTS MEETING May 31, 1988 - MEETING 88-22 On May 31, 1988 an Operating Reactors Events meeting (88 22) was held to brief senior managers from NRR, RES, AE00, Regional Offices, and Commission staff on events which occurred since our last meeting on May 24, 1988. The list of attendees is included as. Enclosure 1.

The events discussed and the significant elements of these events are presented in Enclosure 2. Enclosure 3 presents a report.to_date of long-term followup assignments and a summary of reactor scrams. One significant event was identified for input to NRC's performance indicator program. No events were suggested for long-term followup.

Oristca D. Ly. z.Q Wayne Lanning, Chief Events Assessment Branch Division of Operational Events Assessrc.ent Office of Nuclear Reactor Regulation

Enclosures:

As stated cc w/Enclo.:

See Next Page O

DISTRIBUTION CentraLFile D '4  :

EAB Reading File . l' y I Circulating Copy EAB Staff  ; [gi' dC7 l '

11LReardon, EAB D0udinot. EAB f--jf/4[?

LKilgore, SECY, PDR OFC :EAB: :C: AB:NRR  :  :  :  :  :

. . _ _ _ ; . 4) a...:. . . ; L....:.___...............___...__................._____.__..___...  !

NAME :MLRe :WL ir g' :  :  :  :  :

DATt' :05/3/ /88 :U5/7//88  :  :  :  :  :

0FFICIAL RECORD COPY 8806130183 PDF ORG  % PDR 01 l

CC:

, T. hurley, 12G-18 J. Sniezek,- 12G-18 F. Miraglia, 12G-18 .J. Forsyth, INP0 E. Jordan, AE0D H. Harper, EWS-263

'E. Beckjord, NL-007 D. Nuller, 13D-1 W. Russell, RI S. Sands, 13D-1

8. Davis, Rlll J. Stolz, 13H-3 J. Nelson Grace, Rll P. Xadambi, 13D-18 ,

R. D. Martin, RIV J. Calvo, 130-18 '

J. B. Martin, RV R. Hernan, 13H-3 W. Kane, RI M. Grotenhuis, 13D-1 L. Reyes, RIl E. Greenman, RIII J. Callan, RIV D. Kirsch, RV S. Varga, 14E-4 D. Crutchfield, 13A-2 B. Boger, 14A-2  ;

G. Lainas, 14H-3 i G. Holahan, 13E-4 i L. Shao, 8E-2 --

J. Partlow, 70-24 <

B. Grimes, 9A-2 F. Congel, 10E-4 .

E. Weiss, AEOD l S. Black, 12E-4 1 T. Martin, 12G-18 J. Stone, 90-4 i R. Hernan, 13H-3 H. Bailey, AE00  ;

J. Guttmann, SECY l A. Thacani, 7E-4 1 S. Rubin, AE00 l

l l

l i

a go J "'%q'o, UNITED STATES I ' ', .3 '$ '

NUCLE AR REGULATORY COMMISSION 3 .'g- .p WASHING TON. D. C. 20555 SA , ,a 4 . . . . . ,$ ,

M 01 1N8 HEMORANDUM FOR: Charles E. Rossi, Director i Division of Operaticnal Events Assessment Office of Nuclear Reactor Regulation FROM: Wayne Lanning, Chief Events Assessment Branch Division of Operational Events Assessment Office of Nuclear Reactor Regulation

SUBJECT:

THE OPERATING REACTORS EVENTS MEETING May 31, 1988 - MEETING 88-22 .

On May 31, 1988 an Operating Reactors Events meeting (88-22) was held to brief senior managers from NRR, RES, AE00, Regional Offices, and Comission 4 staff on events which occurred since our last meeting on May 24, 1988. The i list of attendees is included as Enclosure 1.

1 The events discussed and the significant elements of these events are presented l in Enclosure 2. E., closure 3 presents a report-to-date of long-term followup 1 assignments and a sumary of reactor scrams. One significant event was identified for input to NRC's performance indicator program. No events were suggested for long-term followup.

\

w Wayrte Lanning, Chief Events Assessment Branch Division of Operational vents Assessment I Office of Nuclear Reactor Regulation  !

Enclosures:

As stated cc w/Enclo.:

See Next Page

ENCLOSURE 1 LIST OF ATTENDEES OPERATING REACTORS EVENTS BRIEFING (88-22)

May 31, 1988 NAME ORGANIZATION NAME ORGANIZATION W. Lanning NRR/00EA C.E. Rossi NRR/DOEA M.L. Reardon NRR/00EA C. Haughney NRR/DRIS C. Ader 0CM/TR P.D. Milano NRR/PD4 D. Crutchfiela NRR/DRSP L.S. Rubinstein NRR/PDSNP R. Scholl NRR/00EA B.A. Boger NRR/ADR1 T. Elsasser OCM/KC W. Troskoski DEDR0 ~~

A. Vietti-Cook OCM/LZ J. Page RES/ElB D. Fischer NRR/00EA M. Caruso NRR/DRSP V. Benaroya Ar00/DSP S. Sands NRR/PD3-2 P. Baranowsky NhR/DOEA J. Richardson NRR/ DEST W. Minners RES/DRPS 1

1 1

)

A

ENCLOSURE 2 OPERATING REACJORS EVENTS BRIEFING. 88-22 EVENTS ASSESSMENT BRANCH LOCATION: 12-B-11 WHITE FLINT IM_ESDAY, MAY 31, 1988, 11:00 A.M.

1 THIS INFORMATION MAY ALSO BE OBTAINED BY DIALING EXTENSION 21449.

~

BRAIDWOOD 1 BINDING OF MOVABLE INCORE NEUTRON DETECTORS j l

SOUTH TEXAS 1 MAIN FEEDWATER PUMP FAILURE q l

1 i TMI 1 STEAM GENERATOR HIGH-LEVEL TRIP IN BYPASS DRESDEN 3 FIRE IN VALVE ROOM 1

88-22 BRAIDWOOD 1 BINDING 0F M0VADLE INCORE NEUTRON. DETECTORS MAY 9, 1988 PROBLEM BINDING 0F MOVABLE INCORE NEUTRON DETECTORS INSIDE 15 0F 58 THIMBLE TUBES.

CAUSE BINDING THOUGHT TO BE THE RESULT OF BUILDUP 0F GRAPHITE LUBRICANT IN "U" BEND OF THIMBLE TUBE.

SIGNIFICANCE TNABILITY TO PERFORM FLUX MAP OR CAllBRATE EXCORE NUCLEAR INSTRUMENTAI10Nr POTENTIAL TO FAIL TUBE; PERSONNEL HAZARD.

DISCUSSION o INCORE NEUTRON HONITORING SYSTEM TYPICALLY HAS G INCORE NEUTRON DETECTORS.

o EACH DETECTOR CAN BE MANEUVERED FOR INSERTION INTO DIFFERENT THIMBLE TUBES.

o GRAPHITE LUBRICANT APPLIED TO INTERIOR OF THIMBLE TUBES AND TO DETECTOR CABL'ES.

o GRAPHITE LUBRICANT COLLECTS IN "U" BEND OF THIMBLE TUBE (DUE TO GRAVITY).

o UPON INSERTION, DETECTOR CAN BECOME STUCK DUE TO HARDEN LUBRICANT.

o DUE T0 INOPERABILITY OF INCORE NEUTRON MONITORING' SYSTEM (44 THIMBLE TUBES REQUIRED TO BE OPERABLE), LICENSEE MAY NOT BE ABLE TO CONFIRM THAT ACTUAL CORE CONDITIONS ARE BOUNDED BY ASSUMPTIONS IN CHAPTER 15 ACCIDENT ANALYSES.

o PROBLEM RESTRICTS UNIT'S OPERATION TO APPR0X 75% POWER.  !

NEXT SURVEILLANCE WITH DETECTORS DUE BY APPROX JUNE 11, 1988 (EVERY l o

31 EFPD) o BASED UPON PRIOR EXPERIENCE (SEQUOYAH EVENT), STAFF HAS CONCERNS l WITH CLEANING THIMBLE TUBES AT POWER.

1 CONTACT: C. SCHULTEN l

REFERENCE:

MORNING REPORT 05/27/88 1

4 --

BRAlbW00D'1  : o- TillMBLES WERE CLEANED AND LUBRICATED IN DECEMBER-1986 (NEARLY-THE SAME TIME WESTINGHOUSE ISSUED AN ADVISORY IWCAP) AGAINST SUCli14 LUBRICATION PRACTICE) o LICENSEE REQUESTING TECHNICAL SPECIFICATION EXEMPTION T0 44 OPERABLE SIMILAR TO BEAVER VALLEY EXEMPTION, FOLLOWUP REGION FOLLOWING LICENSEE'S CORRECTIVE ACTIONS.

~

i k

6 1

e I

b o

4 l.

l*

4

. I l

TYPICAL WESTINGHOUSE INCORE NEUTRON MONITORING SYSTEM Eves"?$s?BLY a,a -. -

$ 5*~} ,%

WifA

- 5 5 Vf//#f

= = _.- y s p ..< ..

MANUAL is0LAyjoy 4

hhs') OT ON ALL yacyA~icAL ~ q SjM TABLE

\

WuE0n'r""'

/

4/////jf/) yfjjff,j, 1

/ y EBrotad aua'

?!wa '

- /$a IIn'iI"u'n'rN '

e / // \ f L i,)

//

') l

88-22 SOUTH .T.EXAS 1 MAIN FEEDWATER PUMP FAILURE MAY 25, 1988 PROBLEM FAILURE OF MAIN FEEDWATER PUMP (MFWP) DURING LOSS OF 0FFSITE POWER (LOOP) TEST.

CAUSE OVERSPEED. CAUSE OF OVERSPEED YET TO BE DETERMINED.

SIGNIElCANCE o FAILURE PRODUCED MISSILE.

o' POTENTIAL GENERIC IMPLICATIONS. __

DISCUSSION o ON MAY 25, 1988, THE MFWP IN OPERATION FAILED CATASTROPHICALLY DURING LOOP TEST FROM 20% POWER.

o FOLLOWING REACTOR TRif AND TURBINE TRIP, MFWP TURBINE SLOWED-DOWN AS EXPECTED, THEN INCREASED SPEED THROUGH 7000 RPM, o OPERATOR ATTEMPTED TO MANUALLY TRIP THE MFWP TURBINE (AT LOCAL CONTROL STATION).

O MFWP TURBINE SHAFT SECTION (APPR0X. 1 1/2' X 5" DIAMETER) BETWEEN TURBINE CASING AND COUPLING FLANGE SEPARATED FROM ASSEMBLY. PART REC 0VERED IN STATION YARD, o PUMP SHAFT INTACT BUT DEFORMED.

o DIMPLING ON EXTERNAL SURFACE OF TURBINE CASING INDICATED DAMAGE TO TURBINE DRIVER.

o NO EVIDENCE OF EXCESSIVE VIBRATIONS PRIOR TO FAILURE.

o FAILED PUMP EXHlBITED LOWEST VIBRATIONS IN PREVIOUS OPERATION, FOLLOWUP o LICENSEE TO DETERMINE FAILURE MECHANISM.

o WESTINGHOUSE SHIPPING REPLACEMENT TO SITE.

CONTACT: D. CUDIN0T

REFERENCE:

50.72 # 12381 AND MORNING REPORT 05/26/88

88-22 TM1 1 STEAM GENERATOR HIGH-LEVEL TRIP _LN DYPASS MAY 25, 1988 PROBLEM MINOR FEEDWATER 1RANSIENT CAUSED STEAM GENERATOR (S/G) LEVEL TO RISE TO 99% LEVEL ON INDICATION INSTRUMENTATION, MFP TRIP DID NOT OCCUR <

DUE TO HIGH-LEVEL TRIP IN BYPASS.

CAUSE FAILED LOW MAIN FEEDWATER REG, VALVE D/P TRANSNITTER.

SIGNIFICANCE ,

S/G HIGH-LEVEL TRIP INSTALLED IN BABC0X a WILC0X WATER (B&W) PLANTS TO PROVIDE FOR S/G OVERFILL PROTECTION TO KEEP WATER OUT OF STEAM LINES, (PREVENTION OF AN OVERC00 LING TRANSIENT), .

1 DISCUSSION o ON MAY 19, 1988, THE LICENSEE EXPERIENCED A ' MINOR' FEEDWATER TRANSIENT DUE TO A FAILED MF REG, VALVE D/P TRANSMITTER, o LEVEL IN S/Gs ROSE TO 99% AND 94% RESPECTIVELY, o LICENSEE HAD INSTALLED A S/G OVERFILL PROTECTION SYSTEM CONSISTING OF A MFP TRIP ON 95% S/G LEVEL (INDICATING RANGE),

o DUE TO PAST PROBLEMS WITH SLUDGE BUILDUP IN Tile S/G AND BEING NEAR THE END OF THE FUEL CYCLE, THE LEVEL IN THE S/Gs HAS BEEN OPERATING NEAR THE TRIP SETPOINT, o TO PREVENT MINOR FEEDWATER TRANSIENTS CAUSING S/G LEVEL TO RISE TO THE TRIP SETPOINT THE LICENSEE PERFORMED A 50,59 ANALYSIS, o ANALYSIS STATED THAT WATER INTRUSION INTO STEAM LINES WAS NOT A SIGNIFICANT SAFETY PROBLEM, o THE REGION AND THE PM HAVE REVIEWED THE ANALYSIS AND DO NOT OBJECT TO THE CONCLUSIONS REACHED BY THE LICENSEE, CONTACT: J. THOMPSON

REFERENCE:

MORNING REPORT 05/20/88

9 TM1 1 EOLLDEIP o RESOLUTION OF A-47 (EVALUATION OF SAFETY IMPLICATIONS OF CONTROL SYSTEMS) HAS PROPOSED NEW TECH. SPECS. FOR B/h PLANTS TO HAVE OPERABLE SYSTEhS TO PROVIDE FOR S/G OVERFILL PROTECTION, o THE PROPOSED TECH, SPECS, HAVE BEEN APPROVED BY NRR AND CRGR AND ARE POSTED FOR CCMMENTARY IN THE FEDERAL REGISTER (DATED MAY 27, 1988)

~

l l

--r

88-22 DRESDEN 3 FIRE._IN VALVE RCOM MAY 27, 1988 PROBLEN A FIRE WAS DETECTED IN A ROOM CONTAINING VALVES AND PIPING.

SIGNIFICANCE FIRE MAY HAVE AFFECTED SAFFTY-RELATED-EQUIPMENT, CAUSE

~

CAUSE NOT DEFINITELY ESTABLISHED NOR HAS SM0KE BEEN ASSESSED, __

DISCUSSION o PLANT SHUTDOWN FOR REFUELING, c Sh0kE DETECTORS ALERTED OPERATORS TO THE FIRE AT 0930 ON 05/27/88, o FIRE BRIGADE RESPONDED AND EXTINGUISHED FIRE WITHIN 15 MINUTES, o AN UNUSUAL EVENT DECLARED, o MAINTENANCE ACTIVITIES IN ROOM, o CAUSE OF FIRE BELIEVED TO DE ELECTRICAL SHORT IN EITHER WELDitlG CABLE OR LIGHT STRINGER, o NO KNOWN RESIDUAL DAMAGE TO PLANT, o FIRE INVOLVED LEAD WOOL BLANKET AND DUCT TAPE, o ARCING AND COPIOUS SM0KE OBSERVED, o SECONDARY CONTAINMENT UNAVAILABLE FOR A SHORT TIME (10 - 15 MINUTES),

o OPERATORS RESPONDED PROPERLY, CORRECTIVE.JCTION REGION TO FOLLOW LICENSEE'S EVALUATION, CONTACT: J. CARTER

REFERENCE:

PHONE CALL 05/27/80, MORNING REPORT 05/27/88

a D*1'35E :

?M 31, 1 9 itA*US rtnt cw (ggtp:n ratyys ;;3:3p 5101C6 ('.9'J EW (L41 0 i: T IN W 4 1 W e ACTWITIE3 LMIN FILXFS 'MiB FlLXPS LO6 TEM F1L~df3 Ri!N AIDC Ri!N C0ftEiD C0%M::TW ?!A*E T-#i 6 T. ;706'i0, LE!3 T4 3 MO, ?M 19 Mfim e E2 0 1 0 0 0 ,

EaB 0 1 0 0 o .

(

i:E? 0 0 1 0 t .

E*T 0 1 1 0 0 ,

i Vi 0 0 1 0 0 ,

8 1:33 0 2 0 0 0 ,

OTi? 0 1 0 0 0 ,

t F:0-2 2 0 0 0 0 ,

I F!?-3 1 0 0 0 0 ,

Ft;-2 1 _

0 0 0 0 ,

i:' 2 0 0 0 0 .

Fi!! 0 1 0 0 0 ,

S','13 3 1 1 0 1 ,

t TLB 1 4 0 0 t ,

itCB 0 0 1 0 0 ,

5?.9 2 0 1 0 1 ,

FIB 1 2 1 0 1 ,

TCT4. 12 14 7 0 _ _ __ _ _

5 ,

WiEr 4 event assired fer 1mgters follomtp aav N<e been assired to multiple brancNs and a sirgle TR say Ne been assi7ed to sisilar events at multiple pir.ts, i.e.. IAC M744 mas assired to TAB v4 51CB for events at lea <er Valley 2, Calvert Cliffs 2, ar,d Rardo Seco 1.

l _ _ _ _ .

Fa;e N:. 2 oti27lE8 PERFCt.MANCE INDICATORS SISN!F! CANT EVENTS PLENT NAME EVENT EVENT DESCRIPTICN GTR SISNIFICANCE DATE WATERTCRD 05/12/68 LCSS OF SHUTION CCOLINS. O POTENTIAL FOR OR ACTUAL DESRACATION OF SAFETY-RELATED EGUlFMENT Me I

l l

l

?

- tilCf01SotAlSUllAlf j Vlti tillM 95/19/04

!.PLilfSPICll!CDifi Ditt $1f8 tilfP0tt!$1GIALC1958 COIPLI- fil ITD ft)

C&T10IS A MTI ItLOI f0fAL 155 151 2 fti Pits 01111 10 1 2 3 15/23/18S!Ql0fal 05/11/88lifCl 2 98A Pits 0lIIL 10 3 1 4 45/17/88Citivl4 2 1001 Pits 011th 10 2 0 2  !

05/29/88lifCI 2 47A IQI!P8tif 50 4 1 5 l 65/29/88Cifilla 2 15I IQIIPitti 10 2 1 3 l

1 I

l l

i

e TOTES

1. Ft/NT TECIFIC DATA EMED CN INITIfL FEVIEW T "C.72 FGmTS FCR T1-E MIX T INTEFEST. FERIOD IS MIENIGHT ENDAY TW<Lai MIDNIGHT: ELNDAY SCF/cs ffE CFIPED AS FEACTCR FRuitt.il(E ACTLATICFE WICH FEELLT IN FCD POTICN, (ND E'(Q_UCE Ft/ttED ILSIS CR SCF/ts f6 FfRT OF FL/('tED EHJTDCLN IN (CCFD4G WITH A Ft/tX FROCEILFE. TIEFE AFE 1C6 FEfCTCRS FCLDItG FN CFEFATING LICDE.

2. CCPFLICATICPE: FECCNERY CDFLICATED EN ECUIFtENT FAILLFES CR _.

FESCFtEl. EFFERS LtFS.ATED TO C/UEE CF SCRft1.

3. FESCifEL FELATED FFCELDS Ita_L0E H.11W EFFER, FFOCEDLF/L CEICIE?CIES, AND tVtift. STEf41 CBERATCR LEMI. CDUT{L FFOEtB E.

4. "OTER" IPO_UDES AUTCP% TIC SCP/tB ATTRIE4JTED TO E?NIFOtENTAL C/USES (LIGENING), SYSTEM DESIG4, CR LNNOR4 C/EE.

r 4

4 I

.